package com.hudilao.config;

import com.hudilao.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {

    @Value("${lao.path}")
    private String basePath;
    /**
     * 设置静态资源映射
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始进行静态资源映射...");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
        System.out.println("file://"+basePath);
        registry.addResourceHandler("/static-resources/**")
                .addResourceLocations("file:///"+basePath);
    }

    //扩展消息转换器
    //不扩展就会使用springMVC默认的转换器
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters){
        log.info("扩展消息转换器");

        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();

        //设置具体的对象映射器，底层使用jackson将java对象转换为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());

        //通过设置索引，让自己的转换器位于最前面
        converters.add(0,messageConverter);

    }

}
